59 struct diff {struct range old, new; };  member
220 		dd[i].old.from = a;  in readin()
221 		dd[i].old.to = b;  in readin()
225 	dd[i].old.from = dd[i-1].old.to;  in readin()
288 			    d1->old.from, d1->old.to,  in merge()
290 			    d2->old.from, d2->old.to,  in merge()
299 				change(1, &d1->old, 0);  in merge()
312 				change(2, &d2->old, 0);  in merge()
323 			d1[1].old.from = d1->old.from;  in merge()
331 			d2[1].old.from = d2->old.from;  in merge()
339 			dup = duplicate(&d1->old, &d2->old);  in merge()
346 				change(1, &d1->old, dup);  in merge()
347 				change(2, &d2->old, 0);  in merge()
348 				d3 = d1->old.to > d1->old.from ? d1 : d2;  in merge()
362 			d2->old.from -= d2->new.from-d1->new.from;  in merge()
365 			d1->old.from -= d1->new.from-d2->new.from;  in merge()
370 			d2->old.to += d1->new.to - d2->new.to;  in merge()
373 			d1->old.to += d2->new.to - d1->new.to;  in merge()
522 	de[j].old.from = diff->old.from;  in edit()
523 	de[j].old.to = diff->old.to;  in edit()
538 			prange(&de[n].old);  in edscript()
540 			(void) printf("%da\n=======\n", de[n].old.to -1);  in edscript()
552 			(void) printf("%da\n%s\n.\n", de[n].old.from-1, f1mark);  in edscript()